EDGE-Expert Excellence in Design for Greater Efficiencies (EDGE Expert) Exam Questions and Answers

The role of an EDGE Auditor is to verify the project’s self-assessment as submitted, not to modify or redesign the project. The EDGE Expert and Auditor Protocols clearly define the Auditor’s responsibilities: "During an audit, the EDGE Auditor must assess the energy measures as presented in the self-assessment, without altering the design or selections made by the Client. If discrepancies are found, such as incorrect orientation of photovoltaics, the Auditor should note the issue in the audit report but proceed with the assessment as submitted, allowing the Certification Provider to make the final decision" (EDGE Expert and Auditor Protocols, Section 4.1: Audit Process). Option C, assess the energy measures as they are presented without changing the photovoltaic selection, aligns with this protocol. Option A (contact the design team and suggest a better orientation) oversteps the Auditor’s role, as they are not to provide design advice: "Auditors must not engage in design consultancy during an audit to avoid conflicts of interest" (EDGE Expert and Auditor Protocols, Section 2.3: Conflict of Interest). Option B (adjust the area of photovoltaic panels) involves modifying the assessment, which is prohibited: "Auditors cannot modify the Client’s self-assessment; they must evaluate it as submitted" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option D (reject photovoltaics and notify the Client) is also incorrect, as Auditors do not have the authority to reject measures outright: "Rejection of measures is the responsibility of the Certification Provider, not the Auditor" (EDGE Certification Protocol, Section 3.3: Certification Decision). Thus, the Auditor should assess as presented (Option C).

In the CBCI EDGE curriculum, glazing performance is characterized using properties that directly influence solar heat gains through windows, because this is a major driver of cooling energy demand in many climates. The EDGE software uses Solar Heat Gain Coefficient, which represents the fraction of incident solar radiation that enters the building as heat through the glazing system. A lower SHGC reduces solar heat entering the indoor space, lowering cooling loads and improving the project’s energy savings in the improved case.

Shading Coefficient is an older metric that is sometimes referenced in market literature, but EDGE standardizes the glazing solar performance input using SHGC for consistency across regions and products. Solar Heat Loss Coefficient is not a standard glazing metric used in EDGE; heat loss through glazing is addressed using thermal transmittance measures such as U-value rather than an SHLC parameter. Solar Reflectivity may be relevant for certain roof or surface materials, but it is not the primary glazing property used in EDGE to quantify solar heat admitted indoors. Therefore, the correct glass property used in EDGE among the options provided is SHGC.

In the EDGE system, compliance with the Energy Standard is not achieved by selecting a fixed number or a fixed percentage of measures. Instead, the project must demonstrate that the selected package of energy measures, when modeled in the EDGE software, achieves the minimum required energy savings compared to the local baseline. Because projects differ by climate, building type, geometry, and system choices, the number of measures needed can vary widely. One project might reach the target with a few high-impact measures, while another may need many smaller improvements.

At the same time, the curriculum explains that some measures are marked as required. These are mandatory prerequisites within the EDGE methodology and must be implemented where applicable. A project cannot claim compliance while omitting required measures. Therefore, while you may choose any combination of optional measures to reach the energy savings threshold, you must still implement all required measures as part of meeting EDGE requirements.

Options A, B, and C incorrectly imply a universal count-based rule. The only correct statement is that the project must implement at least all required measures, and then add any additional measures necessary to achieve the minimum energy savings target.

In EDGE, certain measures are mandatory to ensure a baseline level of resource efficiency, while others are optional depending on the project’s goals. The EDGE User Guide specifies mandatory measures for certification: "To achieve EDGE certification, projects must meet minimum requirements, including mandatory measures such as insulation of the roof to reduce heat gain or loss, ensuring a basic level of energy efficiency across all building typologies in climates where thermal performance is relevant" (EDGE User Guide, Section 4.1: Insulation Measures). Option B, insulation of roof, is identified as a required measure in EDGE, particularly in climates where heating or cooling loads are significant, which applies to most regions. Option A (green roof) is an optional measure, not mandatory: "Green roofs are an optional measure in EDGE, contributing to energy and water savings but not required for certification" (EDGE User Guide, Section 4.5: Additional Energy Measures). Option C (lighting controls) is also optional, as EDGE allows flexibility in lighting strategies: "Lighting controls, such as occupancy sensors, are optional measures that can enhance energy savings but are not mandatory" (EDGE User Guide, Section 4.4: Lighting Efficiency Measures). Option D (efficient lighting for internal areas) is encouraged but not required: "Efficient lighting for internal areas (EEM22) is an optional measure, requiring at least 90% of lamps to be efficient, but projects can achieve certification without it if other energy measures meet the 20% savings threshold" (EDGE User Guide, Section 4.4: Lighting Efficiency Measures). The EDGE Certification Protocol reinforces this: "Mandatory measures like roof insulation ensure a minimum standard of energy efficiency, while measures like green roofs, lighting controls, and efficient lighting are optional and contribute to overall savings" (EDGE Certification Protocol, Section 2.2: Certification Requirements). Therefore, insulation of the roof (Option B) is the required measure among the options.

The EDGE software estimates water use in homes by considering elements that contribute to potable water demand, focusing on indoor and occupant-related usage. The EDGE User Guide details the elements included in water use calculations: "In EDGE, water use in homes is estimated based on occupant activities, including water for showers, faucets, toilets, laundry, and water heating, which accounts for hot water demand in these applications. These elements are modeled using standard usage assumptions for residential buildings" (EDGE User Guide, Section 5.2: Water Efficiency Measures). Option B, water heating, is explicitly included, as it represents the hot water demand for showers, faucets, and laundry, which is a significant component of residential water use. Option A (HVAC) is incorrect, as HVAC systems primarily consume energy, not water, except in specific cases like cooling towers, which are not typical in homes: "HVAC systems in homes, such as air conditioners, do not directly contribute to water use in EDGE calculations, unlike in commercial buildings with cooling towers" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). Option C (exterior fountains) is also excluded, as EDGE focuses on indoor water use: "Exterior water use, such as for fountains or irrigation, is not typically included in EDGE’s water use estimates for homes, unless specifically modeled as an optional measure, which fountains are not" (EDGE User Guide, Section 5.3: Additional Water Efficiency Measures). Option D (solar water heaters) is a measure to reduce energy use for water heating, not an element of water use itself: "Solar water heaters reduce the energy demand for water heating but do not change the volume of water used, which is what EDGE estimates for water use in homes" (EDGE User Guide, Section 4.2: Energy Efficiency Measures). The EDGE Methodology Report further specifies: "Water use in homes is calculated based on per-capita assumptions for activities like showering, flushing, and water heating, ensuring a standardized baseline for savings calculations" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). Thus, water heating (Option B) is the element considered in EDGE to estimate water use in homes.

Water consumption in hotels varies significantly based on usage patterns, with guest-related activities often dominating the water use breakdown. The EDGE User Guide provides detailed insights into water use in hotels: "In a typical 3-star business hotel, the largest contributor to water consumption is showers in guest rooms, accounting for approximately 40-50% of total water use due to frequent guest showers, especially in urban hotels with high occupancy. Laundry, toilets, and faucets also contribute, but to a lesser extent, with laundry at 15-20%, toilets at 10-15%, and faucets at 5-10%" (EDGE User Guide, Section 5.2: Water Efficiency Measures). Option A, showers in guest rooms, aligns with this breakdown as the element likely to consume the most water. Option B (laundry) is significant but lower than showers: "Laundry in 3-star hotels consumes less water than showers, as laundry is typically centralized and less frequent than daily guest showers" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). Option C (toilets in lobby area) is a minor contributor, as lobby toilets serve fewer users compared to guest rooms: "Toilets in public areas like the lobby have lower usage compared to guest room facilities, contributing only a small fraction of total water use in hotels" (EDGE User Guide, Section 5.2: Water Efficiency Measures). Option D (faucets in guest rooms) also uses less water than showers: "Faucets in guest rooms, used for handwashing or brushing teeth, have lower flow rates and usage frequency compared to showers, which often run for 5-10 minutes per use" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). The EDGE User Guide further elaborates: "In business hotels, showers dominate water use due to high occupancy and guest behavior, making measures like low-flow shower heads particularly effective for water savings" (EDGE User Guide, Section 5.2: Water Efficiency Measures). The EDGE Methodology Report adds: "For a 3-star hotel with 100 rooms and 70% occupancy, showers can account for 45 liters per guest per day, compared to 15 liters for laundry, 10 liters for toilets, and 5 liters for faucets, based on standard usage assumptions" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). Thus, showers in guest rooms (Option A) are likely to consume the most water in this context.

In the CBCI EDGE curriculum, irrigation strategies are evaluated based on their efficiency in delivering water to plants while minimizing evaporation, runoff, and overspray. Drip irrigation is recognized as a water-saving measure because it delivers water directly to the root zone of plants through a network of low-flow emitters. This targeted application significantly reduces water losses due to evaporation and wind drift compared to conventional surface watering methods. As a result, drip irrigation reduces overall irrigation demand and contributes to measurable water savings in the EDGE software.

Hose pipe irrigation and conventional sprinkler irrigation are less efficient because they distribute water over a broader area, increasing the likelihood of evaporation and runoff. These systems typically require more water to achieve the same landscaping results. While water efficient landscaping is an important design strategy that reduces irrigation demand through plant selection and site planning, the specific irrigation system recognized as a direct water-saving measure in EDGE among the options provided is drip irrigation.

Therefore, drip irrigation is the correct answer as it aligns with EDGE water efficiency strategies and directly reduces potable water consumption for landscaping.

The Coefficient of Performance (COP) is used in EDGE to calculate the electrical power input required for a given thermal output of a chiller. The EDGE Methodology Report defines COP as: "COP is the ratio of thermal output to electrical input, expressed as COP = Thermal Output / Electrical Input. To find the electrical input (power rating), rearrange the formula: Electrical Input = Thermal Output / COP" (EDGE Methodology Report Version 2.0, Section 5.1: Energy Efficiency Metrics). Given the COP of the water-cooled chiller as 6 and the cooling thermal load (thermal output) as 3516 W, the power rating is calculated as follows: Electrical Input = 3516 W / 6 = 586 W. Option A, 586 W, matches this calculation. Option B (3510 W) is incorrect, as it is slightly less than the thermal output, implying an unrealistic COP near 1. Option C (3522 W) is slightly above the thermal output, also incorrect. Option D (21096 W) is the result of multiplying the thermal output by the COP (3516 × 6), which is the inverse of the correct calculation. The EDGE User Guide confirms: "For a chiller with a COP of 6, the electrical input is one-sixth of the thermal output, ensuring energy efficiency is accurately assessed" (EDGE User Guide, Section 4.2: Energy Efficiency Measures). Thus, the power rating is 586 W (Option A).

Embodied energy in materials is one of the three core pillars of the EDGE standard, focusing on reducing the environmental impact of construction materials. The EDGE User Guide lists measures that specifically target embodied energy: "To reduce embodied energy in materials, EDGE includes measures such as the use of fly ash concrete, which substitutes a portion of cement with fly ash, a byproduct of coal combustion, thereby lowering the embodied energy and carbon footprint of concrete production" (EDGE User Guide, Section 7.2: Materials Efficiency Measures). Option B, fly ash concrete, directly aligns with this measure, as it reduces the need for high-energy cement production. Option A (external shading) impacts energy by reducing cooling loads but does not directly address embodied energy: "External shading reduces operational energy use but does not contribute to embodied energy savings unless the shading materials themselves are low-impact, which is not specified in EDGE” (EDGE User Guide, Section 3.5: Passive Design Strategies). Option C (occupancy sensors) is an energy efficiency measure for lighting, not materials: "Occupancy sensors reduce lighting energy use but have no direct impact on embodied energy in materials" (EDGE User Guide, Section 4.4: Lighting Efficiency Measures). Option D (low-flow shower heads) targets water efficiency, not materials: "Low-flow shower heads reduce water consumption, but their embodied energy impact is minimal and not a focus of EDGE materials measures" (EDGE User Guide, Section 5.2: Water Efficiency Measures). The EDGE Methodology Report further elaborates: "Fly ash concrete can reduce embodied energy by up to 20% compared to traditional concrete, making it a key measure in EDGE for materials efficiency, especially in high-volume applications like hospitals or hotels" (EDGE Methodology Report Version 2.0, Section 6.1: Embodied Energy in Materials). Other materials measures in EDGE, such as using recycled steel or bamboo, are not listed among the options, making fly ash concrete (Option B) the correct choice for reducing embodied energy.

The issuance of certificates in the EDGE certification process is a defined responsibility assigned to specific roles. The EDGE Certification Protocol states: "The EDGE Preliminary Certificate, awarded at the design stage, is issued by the EDGE Certification Provider after the Auditor submits a recommendation for certification based on the design audit. The Certification Provider reviews the Auditor’s report and, if compliant, issues the certificate" (EDGE Certification Protocol, Section 3.3: Certification Decision). Option C, Certification Provider, aligns with this process, as entities like GBCI are responsible for issuing certificates. Option A (Auditor) is incorrect, as Auditors only recommend certification: "The Auditor’s role is to provide a recommendation, not to issue the certificate" (EDGE Expert and Auditor Protocols, Section 2.2: Roles of EDGE Auditor). Option B (Expert) is also incorrect, as Experts advise on design, not certification: "EDGE Experts assist with project design and self-assessment, not certification issuance" (EDGE Expert and Auditor Protocols, Section 2.1: Roles of EDGE Expert). Option D (Operations and Management Team) is wrong, as this team supports the overall program, not individual certifications: "The EDGE Operations and Management Team oversees program development, not certificate issuance" (EDGE Certification Protocol, Section 1.3: Program Structure). Thus, the Preliminary Certificate is issued by the Certification Provider (Option C).

EDGE Auditors must adhere to strict protocols ensuring that all claimed measures are supported by verifiable evidence, especially during audits. The EDGE Expert and Auditor Protocols state: "If a claimed measure, such as water-efficient faucets, lacks supporting documentation like specifications or manufacturer’s data sheets, the Auditor must exclude the measure from the project assessment. The Auditor is not permitted to test equipment, substitute evidence, or mandate replacements, as their role is to verify, not rectify, the Client’s submission" (EDGE Expert and Auditor Protocols, Section 4.2: Evidence Verification). Option A, exclude the faucets from the project, aligns with this protocol, as the lack of specifications prevents verification. Option B (test the faucets’ flow rates) is incorrect, as Auditors cannot conduct tests: "Auditors are not responsible for testing equipment; they must rely on provided documentation" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option C (require the owner to replace the faucets) oversteps the Auditor’s role: "Auditors cannot mandate changes to the project; they assess what is submitted" (EDGE Expert and Auditor Protocols, Section 2.3: Conflict of Interest). Option D (find a product with the same parameters) is also prohibited: "Auditors cannot substitute or assume evidence on behalf of the Client" (EDGE Expert and Auditor Protocols, Section 4.2: Evidence Verification). Thus, the Auditor should exclude the faucets (Option A).

The EDGE software uses a Base Case to establish a benchmark for resource consumption, tailored to local conditions. The EDGE Methodology Report explains how the Base Case is constructed: "The Base Case for external wall materials in hotels is determined using data from market surveys of typical building practices in the project’s country, supplemented by national building performance codes where available. This ensures the baseline reflects local construction norms and regulatory standards" (EDGE Methodology Report Version 2.0, Section 3.1: Base Case Determination). Option A matches this description by referencing typical building practices and national codes. Option B incorrectly refers to global practices and international codes, which EDGE does not use, as the software prioritizes local context. Option C, focusing on corporate specifications, is not part of the Base Case methodology, as the Base Case is standardized, not project-specific. Option D, involving local suppliers or accreditation, is irrelevant to how EDGE determines the Base Case, which relies on broader market data rather than supplier-specific information.

In the CBCI EDGE curriculum, lighting efficiency is a critical strategy for reducing internal loads and lowering overall building energy consumption. Lighting efficacy is measured in lumens per watt, indicating how much visible light is produced for each unit of electrical power consumed. Among the listed options, light emitting diodes, or LEDs, provide the highest efficacy.

Typical performance ranges show that T8 and T5 fluorescent lamps are more efficient than older lighting technologies but generally deliver lower lumens per watt compared to modern LED systems. Compact fluorescent lamps are also more efficient than incandescent lighting but still fall short of the efficacy achieved by LEDs. Contemporary LED fixtures can exceed 100 lumens per watt and in many cases reach significantly higher values depending on product quality and design.

The EDGE software rewards high-efficiency lighting systems because reducing lighting power density directly lowers cooling loads in air-conditioned spaces and decreases total delivered energy consumption. LEDs also offer additional advantages such as longer lifespan and lower maintenance requirements, further supporting sustainable building design objectives. Therefore, among the listed options, LEDs have the highest efficacy and are the correct answer.

The EDGE Auditor’s submission for Preliminary Certification (design stage) must include specific elements to support the recommendation for certification. The EDGE Certification Protocol specifies: "For Preliminary Certification, the EDGE Auditor’s submission must include compliance documents for the selected measures, such as drawings, specifications, and manufacturer’s data sheets, which verify that the design aligns with the self-assessment in the EDGE software. These documents are reviewed by the Certification Provider to confirm eligibility" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option C, compliance documents for selected measures, directly matches this requirement. Option A (all available design data) is too broad and not required: "Only documents directly related to the selected measures are needed, not all design data" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option B (Chapter 5 EDGE certification protocol) is incorrect, as this refers to the protocol document itself, not a submission component: "The certification protocol is a reference, not part of the Auditor’s submission" (EDGE Certification Protocol, Section 1.1: Overview). Option D (design audit site visit results) is incorrect, as site visits are not required at the design stage: "Preliminary Certification is based on a desk audit, not a site visit, which occurs at the post-construction stage" (EDGE Certification Protocol, Section 3.3: Certification Decision). Thus, compliance documents (Option C) are required in the submission.

EDGE certification applies to specific building typologies that align with its focus on resource efficiency in new constructions and major renovations. The EDGE User Guide lists the covered building types: "EDGE certification is available for the following building typologies: homes, hotels, offices, hospitals, retail, schools, warehouses, and light industry buildings. These typologies are selected because they have predictable energy, water, and materials usage patterns that can be modeled in the EDGE software" (EDGE User Guide, Section 1.2: Scope of EDGE Certification). Option A (hospitals), Option B (schools), and Option D (warehouses) are explicitly included in this list, making them eligible for EDGE certification. However, Option C (factories - heavy industry) is not covered, as clarified in the EDGE Certification Protocol: "Heavy industry factories are not covered by EDGE, as their energy and water usage patterns are highly variable and process-driven, making them unsuitable for the standardized modeling approach used in EDGE. Light industry buildings, such as small manufacturing facilities with predictable usage, are included, but heavy industry, such as steel production or chemical manufacturing, is excluded" (EDGE Certification Protocol, Section 1.2: Scope of EDGE Standard). The EDGE Methodology Report further explains: "Heavy industry factories involve complex industrial processes that dominate resource consumption, which cannot be accurately modeled using EDGE’s simplified methodology, unlike hospitals, schools, or warehouses, which have more consistent occupancy and usage patterns" (EDGE Methodology Report Version 2.0, Section 2.1: Calculation Approach). The EDGE User Guide also notes: "Building types like heavy industry factories are outside the scope of EDGE, as the software is designed for commercial and residential buildings with typical HVAC, lighting, and water demands" (EDGE User Guide, Section 1.2: Scope of EDGE Certification). Therefore, factories (heavy industry) (Option C) is the building type not covered by EDGE.

In a hot and dry climate without air-conditioning, thermal comfort relies on passive design strategies that reduce heat gain or improve air movement. The EDGE User Guide discusses passive measures for thermal comfort: "In hot climates without air-conditioning, thermal comfort can be improved through ceiling fans, which enhance air movement, solar shading, which reduces solar heat gain, and wall and roof insulation, which minimizes heat transfer into the building" (EDGE User Guide, Section 3.5: Passive Design Strategies). Option A (ceiling fans) improves air movement, directly impacting thermal comfort: "Ceiling fans increase air speed, enhancing evaporative cooling on occupants’ skin" (EDGE Methodology Report Version 2.0, Section 5.5: Thermal Comfort Measures). Option B (solar shading) reduces heat gain, improving comfort: "External shading reduces solar radiation entering the building, lowering indoor temperatures" (EDGE User Guide, Section 3.5: Passive Design Strategies). Option C (wall and roof insulation) also enhances comfort by reducing heat transfer: "Insulation lowers the U-value of the building envelope, maintaining cooler indoor temperatures" (EDGE User Guide, Section 4.1: Insulation Measures). Option D (solar photovoltaics) generates electricity but does not directly affect thermal comfort in a building without air-conditioning: "Solar photovoltaics contribute to energy supply but do not directly influence indoor thermal comfort unless used to power cooling systems, which are absent in this scenario" (EDGE Methodology Report Version 2.0, Section 5.3: Energy Measures). Thus, solar photovoltaics (Option D) will not impact thermal comfort in this context.

The EDGE standard is designed to be a practical, focused tool for green building certification, emphasizing specific resource efficiency metrics. The EDGE User Guide describes its characteristics: "EDGE is a simple, fast, and smart tool for green building certification. It provides an intuitive interface with a powerful engine that accounts for local climate and building use (simple), identifies measures with the best return on investment (fast), and displays capital costs and payback periods (smart)" (EDGE User Guide, Section 1.1: Introduction to EDGE). Options A, C, and D align with these descriptions. However, Option B (holistic approach that takes into account wider sustainability issues) is not a characteristic of EDGE, as the standard focuses narrowly on energy, water, and embodied energy in materials, not broader sustainability issues like biodiversity or social equity. This is clarified in the EDGE Certification Protocol: "EDGE is not a holistic sustainability standard; it specifically targets resource efficiency in energy, water, and materials, excluding wider sustainability metrics such as indoor air quality or ecological impact" (EDGE Certification Protocol, Section 1.2: Scope of EDGE Standard). Thus, Option B is not a characteristic of the EDGE standard.

The post-construction stage in EDGE certification requires evidence to confirm that the efficiency measures claimed in the design stage have been implemented as specified. For window glazing, which affects energy efficiency through its U-value (thermal transmittance) and SHGC (Solar Heat Gain Coefficient), the EDGE Certification Protocol provides clear requirements: "At the post-construction stage, the Client must provide manufacturer’s data sheets for the window glazing measure, showing the make and model, U-value, and SHGC of the installed glass, to confirm that the glazing matches the specifications claimed in the self-assessment and meets the energy efficiency requirements" (EDGE Certification Protocol, Section 3.4: Post-Construction Requirements). Option C, manufacturer’s data sheets showing the make and model, U-value, and SHGC of the installed glass, directly matches this requirement, as it provides the specific technical data needed to verify compliance. Option A (design building elevations marking the window glass specifications) is relevant at the design stage, not post-construction: "Design elevations are required at the preliminary stage to show intended glazing specifications, not after construction" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option B (bill of quantities with specifications highlighted) is insufficient on its own, as it may not provide detailed technical data: "Bills of quantities may support purchase verification, but manufacturer’s data sheets are required for technical specifications like U-value and SHGC" (EDGE Certification Protocol, Section 3.4: Post-Construction Requirements). Option D (window schedule showing major glass types) is helpful but not sufficient, as it lacks the detailed technical data: "Window schedules may indicate glass types, but they do not replace the need for manufacturer’s data sheets with U-value and SHGC at post-construction" (EDGE User Guide, Section 6.2: Documentation Requirements). The EDGE User Guide further clarifies: "For glazing measures, post-construction evidence must confirm the installed product’s performance through manufacturer’s data sheets, ensuring alignment with the design-stage claims" (EDGE User Guide, Section 4.1: Insulation Measures). Thus, manufacturer’s data sheets (Option C) are required at the post-construction stage.

The EDGE App relies on location-specific climate data to calculate resource savings, but not all cities are listed. The EDGE User Guide provides guidance for such cases: "If the project city is not listed in the EDGE App, the user should choose the closest city to the project location that is available in the database. If necessary, the user can edit the climate data (e.g., temperature, humidity) to better reflect the project’s actual conditions, ensuring accurate calculations" (EDGE User Guide, Section 2.2: Project Setup). Option B, choose the closest city and edit the climate data if necessary, directly matches this protocol. Option A (write to EDGE Certifier and wait) is incorrect, as this is not a required step: "Users are not required to request new cities; they can proceed by selecting the closest city" (EDGE User Guide, Section 2.2: Project Setup). Option C (select any city in the same climate zone globally) is too broad and inaccurate: "Choosing a city from a different region, even in the same climate zone, may lead to incorrect assumptions about local practices and climate" (EDGE Methodology Report Version 2.0, Section 3.2: Climate Data Inputs). Option D (choose the capital city) is also incorrect unless it is the closest: "The capital city should only be selected if it is the nearest available option in the database" (EDGE User Guide, Section 2.2: Project Setup). Thus, the correct protocol is to choose the closest city and edit climate data (Option B).

According to the CBCI EDGE curriculum, the EDGE software calculates and reports building energy performance based on delivered energy consumption. Delivered energy refers to the actual energy supplied to the building from external sources such as electricity from the grid, natural gas, district cooling, or other fuels. The software estimates annual energy use for both the baseline case and the improved case and expresses savings as a percentage reduction in delivered energy.

EDGE does not primarily report results in terms of primary energy, which would include upstream energy losses associated with extraction, generation, and transmission. While primary energy is a common metric in some building assessment systems, EDGE focuses on delivered energy because it is directly measurable, easier to verify, and more applicable across diverse markets globally.

Electrical energy alone is also not the sole output, since buildings may use multiple energy carriers such as gas or district systems. Renewable energy is considered within the improved case when on-site systems such as solar photovoltaics are included, but it is not itself the energy consumption result; rather, it offsets delivered energy demand. Therefore, the correct answer is delivered energy.

The Coefficient of Performance (COP) is a critical metric in EDGE for assessing the energy efficiency of chillers, a common green building design element. The EDGE Methodology Report defines COP for electrical chillers: "The Coefficient of Performance (COP) of an electrical chiller is defined as the ratio of thermal output (cooling provided, measured in kW) to electrical input (power consumed, measured in kW). A higher COP indicates greater efficiency, as more cooling is produced per unit of electricity" (EDGE Methodology Report Version 2.0, Section 5.1: Energy Efficiency Metrics). Option B, thermal output / electrical input, matches this definition directly. Option A (thermal output / thermal input) is incorrect, as it applies to heat-driven systems like absorption chillers, not electrical ones. Option C (electrical input / thermal output) inverts the ratio, representing the inverse of COP. Option D (electrical output / electrical input) is irrelevant, as chillers produce thermal output, not electrical output. The EDGE User Guide reinforces this: "For air-cooled and water-cooled chillers, COP is calculated as thermal output divided by electrical input to evaluate energy efficiency" (EDGE User Guide, Section 4.2: Energy Efficiency Measures).

Under the CBCI EDGE curriculum, EDGE Certified and EDGE Advanced are one-time certifications and do not require renewal. EDGE Zero Carbon is treated differently because it depends on ongoing operational conditions, especially how the building’s remaining operational emissions are addressed through renewable electricity and, where applicable, offsets. For this reason, EDGE Zero Carbon certificates include an expiration date and require renewal to confirm that the carbon strategy remains valid over time.

The EDGE Zero Carbon rules specify different expiration periods depending on how the project achieves the renewable electricity and emissions balance. When a project meets the EDGE Zero Carbon criteria fully on-site, including the generation of on-site renewable electricity, the certificate expires after four years. This longer validity period reflects the higher confidence and stability associated with on-site renewable generation that is physically tied to the building and less dependent on external contracts or market instruments.

By comparison, projects that rely on purchased off-site renewable electricity and or carbon offsets have a shorter certificate validity period because procurement terms and availability can change. Therefore, for a fully on-site renewable electricity EDGE Zero Carbon project, the correct expiration period is four years.

Increasing the glazing area in an office building affects various aspects of energy consumption due to changes in heat gain, heat loss, and natural light availability, but it does not influence all building systems. The EDGE User Guide explains the impacts of glazing: "Increasing the glazing area (window-to-wall ratio, WWR) in an office building typically increases cooling demand due to higher solar heat gain, increases heating demand in colder climates due to greater heat loss through windows, and reduces lighting energy by allowing more natural daylight, assuming proper daylighting design" (EDGE User Guide, Section 3.5: Passive Design Strategies). Option A (cooling demand) is affected, as more glazing increases solar heat gain: "Higher WWR leads to greater cooling loads in hot climates due to increased solar radiation entering the building" (EDGE Methodology Report Version 2.0, Section 5.2: Energy Calculation Methods). Option B (heating demand) is also impacted, particularly in cooler climates: "Larger glazing areas increase heat loss in cold climates, raising heating demand due to the lower thermal resistance of windows compared to walls" (EDGE User Guide, Section 4.1: Insulation Measures). Option C (lighting energy) is affected, as more glazing can reduce the need for artificial lighting: "Increased glazing can lower lighting energy by enhancing daylight penetration, provided glare is controlled" (EDGE User Guide, Section 4.4: Lighting Efficiency Measures). However, Option D (hot water demand) is not impacted by glazing area, as hot water use is tied to occupant activities (e.g., showers, cleaning) rather than building envelope design: "Hot water demand in EDGE is determined by occupant use patterns, such as the number of showers or laundry cycles, and is not influenced by glazing area or WWR" (EDGE Methodology Report Version 2.0, Section 4.2: Water Savings Calculations). The EDGE User Guide further confirms: "Glazing area impacts energy-related metrics like cooling, heating, and lighting, but has no direct effect on hot water demand, which is calculated separately based on usage assumptions" (EDGE User Guide, Section 5.2: Water Efficiency Measures). Therefore, increasing glazing area does not impact hot water demand (Option D).

The role of an EDGE Auditor during a design audit (Preliminary Certification stage) is to verify compliance with the EDGE standard, which requires at least 20% savings in energy, water, and embodied energy in materials. If the project does not meet the standard, the Auditor must follow specific protocols without overstepping their role. The EDGE Expert and Auditor Protocols outline the acceptable actions: "If a project does not meet the EDGE standard for energy during a design audit, the Auditor should inform the Client of the shortfall and ask them to use the EDGE tool again to identify additional measures that will take the project comfortably over the EDGE standard (e.g., 20% energy savings). The Auditor must not provide design advice or modify the assessment themselves, as their role is to verify, not consult" (EDGE Expert and Auditor Protocols, Section 4.1: Audit Process). Option A, ask the Client to use the EDGE tool again to identify options that will take the project comfortably over the EDGE standard, directly aligns with this guidance, as it keeps the Auditor in a verification role while encouraging the Client to revise their design. Option B (contact the design team directly to work with them) is incorrect, as it violates the Auditor’s independence: "The Auditor must not engage directly with the design team to improve the project, as this constitutes consultancy, which conflicts with their role as an independent verifier" (EDGE Expert and Auditor Protocols, Section 2.3: Conflict of Interest). Option C (take no further action) is also incorrect, as the Auditor has a responsibility to report the shortfall: "If a project does not meet the EDGE standard, the Auditor must document the failure in the audit report and inform the Client, rather than abandoning the process" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option D (provide a list of measures based on the Auditor’s experience) oversteps the Auditor’s role by offering consultancy: "The Auditor cannot provide specific design recommendations or measures, as this compromises their impartiality; they must direct the Client to use the EDGE software or consult an EDGE Expert" (EDGE Expert and Auditor Protocols, Section 2.3: Conflict of Interest). The EDGE User Guide further supports: "During a design audit, the Auditor’s role is to assess compliance, not to guide the design process; if the project falls short, the Client should revisit the EDGE tool to explore additional measures, potentially with the help of an EDGE Expert" (EDGE User Guide, Section 6.5: Working with EDGE Auditors). The EDGE Certification Protocol adds: "The Auditor’s report should note the energy shortfall and recommend that the Client revise the self-assessment to meet the 20% savings threshold, ensuring the process remains Client-driven" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Thus, asking the Client to use the EDGE tool again (Option A) is the acceptable course of action.

In the CBCI EDGE curriculum, the EDGE Baseline is not fixed permanently because construction practices, typical system efficiencies, and national or city regulations evolve over time. To ensure that EDGE continues to represent a realistic and fair comparison against “standard practice” in each location, the EDGE Baseline is periodically reviewed and updated. The curriculum explains that baseline reviews are undertaken every 3 to 5 years when needed, and this review can include updates to the geographic coverage of EDGE, such as adding new countries or refining baselines where market conditions or codes have changed.

This review cycle helps maintain the credibility of the 20 percent savings thresholds by making sure the baseline remains aligned with what is commonly built in a given market. If baselines were updated too frequently, it would create instability for project planning; if updated too rarely, the baseline could become outdated and no longer reflect typical practice. The 3 to 5 year interval balances stability with relevance, ensuring that EDGE benchmarking stays accurate across different regions and over time.

According to the CBCI EDGE curriculum, the embodied energy calculation in the EDGE software focuses primarily on the energy associated with the production stages of building materials. This includes raw material extraction and processing, as well as manufacturing and transformation into finished construction products. The embodied energy values used in EDGE are derived from standardized lifecycle inventory data covering cradle-to-gate processes.

Raw material wastage during manufacturing is typically already embedded within industry production data and reflected in the embodied energy coefficients assigned to materials in the EDGE database. Therefore, these upstream losses are implicitly accounted for in the calculation methodology.

However, material wastage during construction on site is not included in the embodied energy calculation within the EDGE software. The tool assumes standardized material quantities based on design inputs and does not factor in site-specific construction inefficiencies, off-cuts, breakage, or improper handling losses. This exclusion simplifies the assessment and ensures consistency across projects globally. Therefore, the embodied energy calculation excludes construction-stage material wastage, making option C the correct answer.

In the CBCI EDGE curriculum, the embodied carbon assessment for existing buildings is handled differently from new construction. The key principle is that the existing building fabric is treated as already “sunk” and is not counted again in the embodied carbon calculation. This means elements such as the existing roof construction do not increase embodied carbon in the EDGE assessment for a retrofit project, because EDGE focuses on what is newly added or replaced as part of the upgrade scope.

Embodied carbon in EDGE is driven by the quantities and types of new construction materials introduced through the retrofit, such as added insulation, new wall or roof layers, new glazing, new finishes, or other building-material interventions. Therefore, the factor that increases embodied carbon is the inclusion of new materials in the retrofit scope.

While external shading devices can indeed add embodied carbon because they are additional materials, the most accurate and complete statement in the options is the broader one: any new materials added during the retrofit increase embodied carbon. New mechanical systems are generally treated under operational energy impacts rather than being core contributors in the EDGE embodied carbon in materials calculation.

At the design stage (Preliminary Certification), EDGE requires specific documentation to verify that proposed measures, such as ceiling fans, will be implemented as claimed. The EDGE Certification Protocol specifies: "For measures like ceiling fans at the design stage, the Client must provide evidence such as manufacturer’s data sheets that detail the make, model, and specifications (e.g., power rating, air movement capacity) to confirm the fans meet the efficiency criteria for improving thermal comfort" (EDGE Certification Protocol, Section 3.2: Audit Requirements). Option C, manufacturer’s data sheet of the ceiling fans, aligns with this requirement, as it provides the necessary specifications for verification. Option A (photographs of installed ceiling fans) is relevant at the post-construction stage, not design: "Photographs are required at the post-construction stage to confirm installation, not at the design stage" (EDGE Certification Protocol, Section 3.4: Post-Construction Requirements). Option B (CFD assessment) is not required, as EDGE uses simplified calculations: "EDGE does not require CFD assessments for air movement; fan specifications suffice for design-stage verification" (EDGE Methodology Report Version 2.0, Section 5.5: Thermal Comfort Measures). Option D (purchase receipts) is also a post-construction requirement: "Purchase receipts verify installation, not design intent" (EDGE Certification Protocol, Section 3.4: Post-Construction Requirements). Thus, the manufacturer’s data sheet (Option C) is the correct evidence at the design stage.

Air-cooled chillers are a type of HVAC system commonly evaluated in EDGE for their energy efficiency in green building design. The EDGE Methodology Report Version 2.0 outlines the components of air-cooled chillers in the context of energy efficiency measures. According to the EDGE User Guide (Version 2.1), air-cooled chillers differ from water-cooled chillers by not requiring a cooling tower or associated water-based components like a condenser pump. The guide states: "Air-cooled chillers consist of a compressor, air-cooled condenser, thermal expansion valve, and evaporator, which work together to provide cooling by rejecting heat directly to the ambient air" (EDGE User Guide, Section 4.2: Energy Efficiency Measures). Option A includes a cooling tower and condenser pump, which are specific to water-cooled chillers. Option D mentions a water-cooled condenser, which is incorrect for air-cooled systems. Option C includes a chilled water pump, which is not a core component of the chiller itself but part of the broader system. Option B accurately lists the compressor, condenser (air-cooled, implied), thermal expansion valve, and evaporator, aligning with the EDGE description of air-cooled chiller components.

The baseline assumptions in EDGE software, known as the Base Case, are critical for calculating resource savings and are determined using standardized data. The EDGE Methodology Report explains: "Baseline assumptions in EDGE, referred to as the Base Case, are determined by market surveys of typical construction practices in the project’s country, reflecting common materials, systems, and design practices for the selected typology and location" (EDGE Methodology Report Version 2.0, Section 3.1: Base Case Determination). Option C, market survey of typical construction practices, aligns with this methodology. Option A (EDGE software users) is incorrect, as users do not set the baseline; they input project-specific data. Option B (EDGE Auditors) is also incorrect, as auditors verify compliance, not establish baselines. Option D (market survey of best construction practices) is wrong because EDGE uses typical practices, not best practices, to create a realistic benchmark, as clarified in the EDGE User Guide: "The Base Case reflects typical local practices, not best practices, to ensure a fair comparison for resource savings" (EDGE User Guide, Section 2.3: Using the EDGE App).